has anyone used them for decals before?
Never heard of them.
If you are interested in vinyl transfer graphics, myself and a few others here use G Scale Graphics
for our custom work. Del is very easy to work with.
I have been making my own decals, there are a lot of YouTube videos on this. It became a hit and miss for me as I have limited computer skills when it comes the scaling the idem I want to print to the size I wanted. I only want the water type decals as the stick-on ones just look too toy like and doesn’t give a professional look. I use K4 Decals sold on eBay and letter as I want, very good quality and priced very reasonable.